beae6579 |
1 | ;; Common Lisp bindings for GTK+ v2.x |
2 | ;; Copyright 1999-2006 Espen S. Johnsen <espen@users.sf.net> |
3 | ;; |
4 | ;; Permission is hereby granted, free of charge, to any person obtaining |
5 | ;; a copy of this software and associated documentation files (the |
6 | ;; "Software"), to deal in the Software without restriction, including |
7 | ;; without limitation the rights to use, copy, modify, merge, publish, |
8 | ;; distribute, sublicense, and/or sell copies of the Software, and to |
9 | ;; permit persons to whom the Software is furnished to do so, subject to |
10 | ;; the following conditions: |
11 | ;; |
12 | ;; The above copyright notice and this permission notice shall be |
13 | ;; included in all copies or substantial portions of the Software. |
14 | ;; |
15 | ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
16 | ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
17 | ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
18 | ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
19 | ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
20 | ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
21 | ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
22 | |
cab97f15 |
23 | ;; $Id: interface.lisp,v 1.9 2008-10-08 16:34:07 espen Exp $ |
beae6579 |
24 | |
25 | (in-package "GFFI") |
26 | |
27 | |
28 | ;;;; Foreign function call interface |
29 | |
30 | (defvar *package-prefix* nil) |
31 | |
32 | (defun set-package-prefix (prefix &optional (package *package*)) |
33 | (let ((package (find-package package))) |
34 | (setq *package-prefix* (delete package *package-prefix* :key #'car)) |
35 | (push (cons package prefix) *package-prefix*)) |
36 | prefix) |
37 | |
38 | (defun package-prefix (&optional (package *package*)) |
39 | (let ((package (find-package package))) |
40 | (or |
41 | (cdr (assoc package *package-prefix*)) |
42 | (substitute #\_ #\- (string-downcase (package-name package)))))) |
43 | |
44 | (defun find-prefix-package (prefix) |
45 | (or |
46 | (car (rassoc (string-downcase prefix) *package-prefix* :test #'string=)) |
47 | (find-package (string-upcase prefix)))) |
48 | |
49 | (defmacro use-prefix (prefix &optional (package *package*)) |
50 | `(eval-when (:compile-toplevel :load-toplevel :execute) |
51 | (set-package-prefix ,prefix ,package))) |
52 | |
53 | |
54 | (defun default-alien-fname (lisp-name) |
55 | (let* ((name (substitute #\_ #\- (string-downcase lisp-name))) |
49ef0cdc |
56 | (start (position-if-not #'(lambda (char) (char= char #\%)) name)) |
57 | (end (if (string= "_p" name :start2 (- (length name) 2)) |
58 | (- (length name) 2) |
59 | (length name))) |
60 | (stripped-name (subseq name start end)) |
beae6579 |
61 | (prefix (package-prefix *package*))) |
62 | (if (or (not prefix) (string= prefix "")) |
63 | stripped-name |
64 | (format nil "~A_~A" prefix stripped-name)))) |
65 | |
66 | (defun default-alien-type-name (type-name) |
67 | (let ((prefix (package-prefix *package*))) |
68 | (apply |
69 | #'concatenate |
70 | 'string |
71 | (mapcar |
72 | #'string-capitalize |
73 | (cons prefix (split-string (symbol-name type-name) :delimiter #\-)))))) |
74 | |
75 | (defun default-type-name (alien-name) |
76 | (let ((parts |
77 | (mapcar |
78 | #'string-upcase |
79 | (split-string-if alien-name #'upper-case-p)))) |
80 | (intern |
81 | (concatenate-strings (rest parts) #\-) |
82 | (find-prefix-package (first parts))))) |
83 | |
84 | |
85 | (defun in-arg-p (style) |
86 | (find style '(:in :in/out :in/return :in-out :return))) |
87 | |
88 | (defun out-arg-p (style) |
89 | (find style '(:out :in/out :in-out))) |
90 | |
91 | (defun return-arg-p (style) |
92 | (find style '(:in/return :return))) |
93 | |
94 | (defmacro defbinding (name lambda-list return-type &rest args) |
95 | (multiple-value-bind (lisp-name c-name) |
96 | (if (atom name) |
97 | (values name (default-alien-fname name)) |
98 | (values-list name)) |
99 | |
100 | (let* ((lambda-list-supplied-p lambda-list) |
101 | (lambda-list (unless (equal lambda-list '(nil)) lambda-list)) |
2c708568 |
102 | (arg-types ()) |
103 | (aux-bindings ()) |
beae6579 |
104 | (doc-string (when (stringp (first args)) (pop args))) |
105 | (parsed-args |
106 | (mapcar |
107 | #'(lambda (arg) |
108 | (destructuring-bind |
2c708568 |
109 | (expr type &optional (style :in) (out-type type)) |
110 | (if (atom arg) |
111 | (list arg arg) |
112 | arg) |
beae6579 |
113 | (cond |
114 | ((find style '(:in-out :return)) |
115 | (warn "Deprecated argument style: ~S" style)) |
116 | ((not (find style '(:in :out :in/out :in/return))) |
117 | (error "Bogus argument style: ~S" style))) |
118 | (when (and |
119 | (not lambda-list-supplied-p) |
2c708568 |
120 | (namep expr) (in-arg-p style) |
121 | (not (find expr lambda-list))) |
122 | (push expr lambda-list) |
123 | (push type arg-types)) |
beae6579 |
124 | (let ((aux (unless (or (not (in-arg-p style)) (namep expr)) |
125 | (gensym)))) |
126 | (when aux |
2c708568 |
127 | (push (list aux expr) aux-bindings)) |
beae6579 |
128 | (list |
129 | (cond |
130 | ((and (namep expr) (not (in-arg-p style))) expr) |
02198d7d |
131 | ((namep expr) |
132 | #-clisp(make-symbol (string expr)) |
133 | ;; The above used to work in CLISP, but I'm |
134 | ;; not sure exactly at which version it |
135 | ;; broke. The following could potentially |
136 | ;; cause variable capturing |
137 | #+clisp(intern (format nil "~A-~A" (string expr) (gensym)))) |
138 | (#-clisp(gensym) |
139 | #+clisp(intern (string (gensym))))) |
beae6579 |
140 | (or aux expr) type style out-type)))) |
141 | args))) |
142 | |
143 | (%defbinding c-name lisp-name |
144 | (if lambda-list-supplied-p lambda-list (nreverse lambda-list)) |
2c708568 |
145 | (not lambda-list-supplied-p) (nreverse arg-types) |
146 | aux-bindings return-type doc-string parsed-args)))) |
beae6579 |
147 | |
148 | |
149 | #+(or cmu sbcl) |
150 | (defun foreign-funcall (cname args return-type) |
151 | (let ((fparams (loop |
152 | for (var expr type style out-type) in args |
153 | collect (if (out-arg-p style) |
154 | `(addr ,var) |
155 | var))) |
156 | (ftypes (loop |
157 | for (var expr type style out-type) in args |
158 | collect (if (out-arg-p style) |
159 | `(* ,(alien-type out-type)) |
160 | (alien-type out-type)))) |
161 | (fname (make-symbol cname))) |
162 | `(with-alien ((,fname (function ,(alien-type return-type) ,@ftypes) :extern ,cname)) |
163 | (alien-funcall ,fname ,@fparams)))) |
164 | |
165 | #+clisp |
166 | (defun foreign-funcall (cname args return-type) |
167 | (let* ((fparams (loop |
168 | for (var expr type style out-type) in args |
169 | collect (if (out-arg-p style) |
170 | `(ffi:c-var-address ,var) |
171 | var))) |
172 | (fargs (loop |
173 | for (var expr type style out-type) in args |
174 | collect (list var (if (out-arg-p style) |
175 | 'ffi:c-pointer |
176 | (alien-type out-type))))) |
177 | (c-function `(ffi:c-function |
178 | (:arguments ,@fargs) |
179 | (:return-type ,(alien-type return-type)) |
180 | (:language :stdc)))) |
181 | `(funcall |
182 | (load-time-value |
4f2a8644 |
183 | (ffi::foreign-library-function |
184 | ,cname (ffi::foreign-library :default) #?(clisp>= 2 40)nil |
beae6579 |
185 | nil (ffi:parse-c-type ',c-function))) |
186 | ,@fparams))) |
187 | |
188 | |
189 | ;; TODO: check if in and out types (if different) translates to same |
190 | ;; alien type |
2c708568 |
191 | (defun %defbinding (cname lisp-name lambda-list declare-p arg-types aux-bindings return-type doc args) |
beae6579 |
192 | (let ((out (loop |
193 | for (var expr type style out-type) in args |
194 | when (or (out-arg-p style) (return-arg-p style)) |
195 | collect (from-alien-form out-type var))) |
196 | (fcall (from-alien-form return-type |
197 | (foreign-funcall cname args return-type)))) |
198 | |
199 | (labels ((create-wrapper (args body) |
200 | (if args |
201 | (destructuring-bind (var expr type style out-type) (first args) |
202 | (declare (ignore out-type)) |
203 | (alien-arg-wrapper type var expr style |
204 | (create-wrapper (rest args) body))) |
205 | body))) |
2c708568 |
206 | `(progn |
207 | ,(when declare-p |
208 | `(declaim |
209 | (ftype |
210 | (function |
211 | ,(mapcar #'argument-type arg-types) |
212 | (values |
213 | ,@(when return-type (list (return-type return-type))) |
214 | ,@(loop |
215 | for (var expr type style out-type) in args |
216 | when (out-arg-p style) |
217 | collect (return-type out-type) |
218 | when (return-arg-p style) |
cab97f15 |
219 | collect (return-type type)))) |
220 | ,lisp-name))) |
2c708568 |
221 | (defun ,lisp-name ,lambda-list |
beae6579 |
222 | ,doc |
2c708568 |
223 | (let ,aux-bindings |
beae6579 |
224 | ,(if return-type |
225 | (create-wrapper args `(values ,fcall ,@out)) |
2c708568 |
226 | (create-wrapper args `(progn ,fcall (values ,@out)))))))))) |
beae6579 |
227 | |
228 | |
229 | |
230 | ;;;; Dynamic (runtime) bindings |
231 | |
232 | (defun mkbinding (name return-type &rest arg-types) |
233 | #+cmu(declare (optimize (inhibit-warnings 3))) |
234 | #+sbcl(declare (muffle-conditions compiler-note)) |
235 | (let* ((c-function |
236 | #+(or cmu sbcl) |
237 | `(function ,@(mapcar #'alien-type (cons return-type arg-types))) |
238 | #+clisp |
239 | `(ffi:c-function |
240 | (:arguments ,@(mapcar |
241 | #'(lambda (type) |
242 | (list (gensym) (alien-type type))) |
243 | arg-types)) |
244 | (:return-type ,(alien-type return-type)) |
245 | (:language :stdc))) |
246 | (foreign |
247 | #+(or cmu sbcl) |
248 | (handler-bind (#+sbcl(compiler-note #'(lambda (condition) |
249 | (declare (ignore condition)) |
250 | (muffle-warning)))) |
251 | (%heap-alien |
252 | (make-heap-alien-info |
253 | :type (parse-alien-type c-function #+sbcl nil) |
254 | :sap-form (let ((address (foreign-symbol-address name))) |
255 | (etypecase address |
256 | (integer (int-sap address)) |
257 | (system-area-pointer address)))))) |
258 | #+clisp |
259 | (ffi::foreign-library-function name |
4f2a8644 |
260 | (ffi::foreign-library :default) #?(clisp>= 2 40)nil |
beae6579 |
261 | nil (ffi:parse-c-type c-function))) |
262 | (return-value-translator (from-alien-function return-type))) |
263 | (multiple-value-bind (arg-translators cleanup-funcs) |
264 | (let ((translator/cleanup-pairs |
265 | (mapcar |
266 | #'(lambda (type) |
267 | (multiple-value-list (to-alien-function type))) |
268 | arg-types))) |
269 | (values |
270 | (mapcar #'first translator/cleanup-pairs) |
271 | (mapcar #'second translator/cleanup-pairs))) |
272 | #'(lambda (&rest args) |
273 | (let ((translated-args (mapcar #'funcall arg-translators args))) |
274 | (prog1 |
275 | (funcall return-value-translator |
276 | #+(or cmu sbcl)(apply #'alien-funcall foreign translated-args) |
277 | #+clisp(apply foreign translated-args)) |
278 | (mapc |
279 | #'(lambda (cleanup arg translated-arg) |
280 | (when cleanup |
281 | (funcall cleanup arg translated-arg))) |
282 | cleanup-funcs args translated-args))))))) |
283 | |
284 | |
285 | |
286 | ;;;; C Callbacks |
287 | |
288 | (defun callback-body (args return-type body) |
289 | (labels ((create-wrappers (args body) |
290 | (if args |
291 | (destructuring-bind (var type) (first args) |
292 | (callback-wrapper type var var |
293 | (create-wrappers (rest args) body))) |
294 | body)) |
295 | (create-body (args body) |
296 | (to-alien-form return-type |
297 | (create-wrappers args `(progn ,@body))))) |
298 | (if (and (consp (first body)) (eq (caar body) 'declare)) |
299 | (let ((ignored (loop |
300 | for declaration in (cdar body) |
301 | when (eq (first declaration) 'ignore) |
302 | nconc (rest declaration)))) |
303 | `(,(first body) |
304 | ,(create-body |
305 | (remove-if #'(lambda (arg) |
306 | (find (first arg) ignored)) |
307 | args) |
308 | (rest body)))) |
309 | (list (create-body args body))))) |
310 | |
311 | |
312 | #+(or cmu sbcl) |
313 | (defmacro define-callback (name return-type args &body body) |
314 | (let ((define-callback |
315 | #+cmu'alien:def-callback |
316 | #+(and sbcl alien-callbacks)'sb-alien::define-alien-callback |
c52ab022 |
317 | #+(and sbcl (not alien-callbacks))'sb-alien:define-alien-function) |
318 | (args (mapcar #'(lambda (arg) |
319 | (if (atom arg) (list arg arg) arg)) |
320 | args))) |
beae6579 |
321 | `(progn |
322 | #+cmu(defparameter ,name nil) |
323 | (,define-callback ,name |
324 | #+(and sbcl alien-callbacks) ,(alien-type return-type) |
325 | (#+(or cmu (and sbcl (not alien-callbacks))),(alien-type return-type) |
326 | ,@(loop |
327 | for (name type) in args |
328 | collect `(,name ,(alien-type type)))) |
329 | ,@(callback-body args return-type body))))) |
330 | |
331 | #+(or cmu sbcl) |
332 | (defun callback-address (callback) |
333 | #+cmu(alien::callback-trampoline callback) |
334 | #+(and sbcl (not alien-callbacks))(sb-alien:alien-function-sap callback) |
335 | #+(and sbcl alien-callbacks)(sb-alien:alien-sap callback)) |
336 | |
337 | #+sbcl |
338 | (deftype callback () |
339 | #-alien-callbacks'sb-alien:alien-function |
340 | #+alien-callbacks'sb-alien:alien) |
341 | |
342 | |
343 | ;;; The callback code for CLISP is based on code from CFFI |
344 | ;;; Copyright (C) 2005, James Bielman <jamesjb@jamesjb.com> |
345 | ;;; (C) 2005, Joerg Hoehle <hoehle@users.sourceforge.net> |
346 | |
347 | |
348 | ;;; *CALLBACKS* contains the callbacks defined by the %DEFCALLBACK |
349 | ;;; macro. The symbol naming the callback is the key, and the value |
350 | ;;; is a list containing a Lisp function, the parsed CLISP FFI type of |
351 | ;;; the callback, and a saved pointer that should not persist across |
352 | ;;; saved images. |
353 | #+clisp |
354 | (progn |
355 | (defvar *callbacks* (make-hash-table)) |
356 | |
357 | ;;; Return a CLISP FFI function type for a CFFI callback function |
358 | ;;; given a return type and list of argument names and types. |
359 | (eval-when (:compile-toplevel :load-toplevel :execute) |
360 | (defun callback-type (return-type arg-names arg-types) |
361 | (ffi:parse-c-type |
362 | `(ffi:c-function |
363 | (:arguments ,@(mapcar (lambda (sym type) |
364 | (list sym (alien-type type))) |
365 | arg-names arg-types)) |
366 | (:return-type ,(alien-type return-type)) |
367 | (:language :stdc))))) |
368 | |
369 | ;;; Register and create a callback function. |
370 | (defun register-callback (name function parsed-type) |
371 | (setf (gethash name *callbacks*) |
372 | (list function parsed-type |
373 | (ffi:with-foreign-object (ptr 'ffi:c-pointer) |
374 | ;; Create callback by converting Lisp function to foreign |
375 | (setf (ffi:memory-as ptr parsed-type) function) |
376 | (ffi:foreign-value ptr))))) |
377 | |
378 | ;;; Restore all saved callback pointers when restarting the Lisp |
379 | ;;; image. This is pushed onto CUSTOM:*INIT-HOOKS*. |
380 | ;;; Needs clisp > 2.35, bugfix 2005-09-29 |
381 | (defun restore-callback-pointers () |
382 | (maphash |
383 | (lambda (name list) |
384 | (register-callback name (first list) (second list))) |
385 | *callbacks*)) |
386 | |
387 | ;;; Add RESTORE-CALLBACK-POINTERS to the lists of functions to run |
388 | ;;; when an image is restarted. |
389 | (eval-when (:load-toplevel :execute) |
390 | (pushnew 'restore-callback-pointers custom:*init-hooks*)) |
391 | |
392 | ;;; Define a callback function NAME to run BODY with arguments |
393 | ;;; ARG-NAMES translated according to ARG-TYPES and the return type |
394 | ;;; translated according to RETTYPE. Obtain a pointer that can be |
395 | ;;; passed to C code for this callback by calling %CALLBACK. |
396 | (defmacro define-callback (name return-type args &body body) |
c52ab022 |
397 | (let* ((args (mapcar #'(lambda (arg) |
398 | (if (atom arg) (list arg arg) arg)) |
399 | args)) |
400 | (arg-names (mapcar #'first args)) |
401 | (arg-types (mapcar #'second args))) |
beae6579 |
402 | `(progn |
403 | (defvar ,name ',name) |
404 | (register-callback ',name |
405 | (lambda ,arg-names ,@(callback-body args return-type body)) |
406 | ,(callback-type return-type arg-names arg-types))))) |
407 | |
408 | ;;; Look up the name of a callback and return a pointer that can be |
409 | ;;; passed to a C function. Signals an error if no callback is |
410 | ;;; defined called NAME. |
411 | (defun callback-address (name) |
412 | (multiple-value-bind (list winp) (gethash name *callbacks*) |
413 | (unless winp |
414 | (error "Undefined callback: ~S" name)) |
415 | (third list))) |
416 | |
417 | (deftype callback () 'symbol)) |
418 | |
419 | |
420 | |
421 | ;;;; Type expansion |
422 | |
423 | (defun type-expand-1 (form) |
424 | #+(or cmu sbcl) |
425 | (let ((def (cond ((symbolp form) |
426 | #+cmu(kernel::info type expander form) |
427 | #+sbcl(sb-impl::info :type :expander form)) |
428 | ((and (consp form) (symbolp (car form))) |
429 | #+cmu(kernel::info type expander (car form)) |
430 | #+sbcl(sb-impl::info :type :expander (car form))) |
431 | (t nil)))) |
432 | (if def |
433 | (values (funcall def (if (consp form) form (list form))) t) |
434 | (values form nil))) |
435 | #+clisp(ext:type-expand form t)) |
436 | |
437 | (defun type-expand-to (type form) |
438 | (labels ((expand (form0) |
439 | (if (eq (first (mklist form0)) type) |
440 | form0 |
441 | (multiple-value-bind (expanded-form expanded-p) |
442 | (type-expand-1 form0) |
443 | (if expanded-p |
444 | (expand expanded-form) |
445 | (error "~A can not be expanded to ~A" form type)))))) |
446 | (expand form))) |
447 | |
448 | |
449 | |
450 | ;;;; Type methods |
451 | |
2c708568 |
452 | (defun find-type-method (name type-spec &optional (error-p t)) |
453 | (let ((type-methods (get name 'type-methods)) |
454 | (specifier (if (atom type-spec) |
455 | type-spec |
456 | (first type-spec)))) |
457 | (or |
458 | (gethash specifier type-methods) |
459 | (when error-p |
460 | (error |
461 | "No explicit type method for ~A when call width type specifier ~A found" |
462 | name type-spec))))) |
463 | |
beae6579 |
464 | (defun find-next-type-method (name type-spec &optional (error-p t)) |
465 | (let ((type-methods (get name 'type-methods))) |
466 | (labels ((search-method-in-cpl-order (classes) |
467 | (when classes |
468 | (or |
469 | (gethash (class-name (first classes)) type-methods) |
470 | (search-method-in-cpl-order (rest classes))))) |
471 | (lookup-method (type-spec) |
472 | (if (and (symbolp type-spec) (find-class type-spec nil)) |
473 | (let ((class (find-class type-spec))) |
584285fb |
474 | #?(or (sbcl>= 0 9 15) (featurep :clisp)) |
beae6579 |
475 | (unless (class-finalized-p class) |
476 | (finalize-inheritance class)) |
477 | (search-method-in-cpl-order |
478 | (rest (class-precedence-list class)))) |
479 | (multiple-value-bind (expanded-type expanded-p) |
480 | (type-expand-1 type-spec) |
481 | (when expanded-p |
482 | (or |
483 | (let ((specifier (etypecase expanded-type |
484 | (symbol expanded-type) |
485 | (list (first expanded-type))))) |
486 | (gethash specifier type-methods)) |
487 | (lookup-method expanded-type)))))) |
488 | (search-built-in-type-hierarchy (sub-tree) |
489 | (when (subtypep type-spec (first sub-tree)) |
490 | (or |
491 | (search-nodes (cddr sub-tree)) |
492 | (second sub-tree)))) |
493 | (search-nodes (nodes) |
494 | (loop |
495 | for node in nodes |
496 | as method = (search-built-in-type-hierarchy node) |
497 | until method |
498 | finally (return method)))) |
499 | (or |
500 | (lookup-method type-spec) |
501 | ;; This is to handle unexpandable types whichs doesn't name a |
502 | ;; class. It may cause infinite loops with illegal |
503 | ;; call-next-method calls |
b673a77b |
504 | (unless (or |
505 | (null type-spec) |
506 | (and (symbolp type-spec) (find-class type-spec nil))) |
beae6579 |
507 | (search-nodes (get name 'built-in-type-hierarchy))) |
508 | (when error-p |
509 | (error "No next type method ~A for type specifier ~A" |
510 | name type-spec)))))) |
511 | |
512 | (defun find-applicable-type-method (name type-spec &optional (error-p t)) |
2c708568 |
513 | (or |
514 | (find-type-method name type-spec nil) |
515 | (find-next-type-method name type-spec nil) |
516 | (when error-p |
517 | (error |
518 | "No applicable type method for ~A when call width type specifier ~A" |
519 | name type-spec)))) |
520 | |
beae6579 |
521 | |
522 | (defun insert-type-in-hierarchy (specifier function nodes) |
523 | (cond |
524 | ((let ((node (find specifier nodes :key #'first))) |
525 | (when node |
526 | (setf (second node) function) |
527 | nodes))) |
528 | ((let ((node |
529 | (find-if |
530 | #'(lambda (node) |
531 | (subtypep specifier (first node))) |
532 | nodes))) |
533 | (when node |
534 | (setf (cddr node) |
535 | (insert-type-in-hierarchy specifier function (cddr node))) |
536 | nodes))) |
537 | ((let ((sub-nodes (remove-if-not |
538 | #'(lambda (node) |
539 | (subtypep (first node) specifier)) |
540 | nodes))) |
541 | (cons |
542 | (list* specifier function sub-nodes) |
543 | (nset-difference nodes sub-nodes)))))) |
544 | |
545 | (defun add-type-method (name specifier function) |
546 | (setf (gethash specifier (get name 'type-methods)) function) |
547 | (when (typep (find-class specifier nil) 'built-in-class) |
548 | (setf (get name 'built-in-type-hierarchy) |
549 | (insert-type-in-hierarchy specifier function |
550 | (get name 'built-in-type-hierarchy))))) |
551 | |
552 | |
553 | (defmacro define-type-generic (name lambda-list &optional documentation) |
554 | (let ((type-spec (first lambda-list))) |
555 | (if (or |
556 | (not lambda-list) |
557 | (find type-spec '(&optional &key &rest &allow-other-keys))) |
558 | (error "A type generic needs at least one required argument") |
559 | `(progn |
560 | (unless (get ',name 'type-methods) |
561 | (setf (get ',name 'type-methods) (make-hash-table)) |
562 | (setf (get ',name 'built-in-type-hierarchy) ())) |
563 | ,(if (intersection '(&optional &key &rest &allow-other-keys) lambda-list) |
564 | (let ((args (make-symbol "ARGS"))) |
565 | `(defun ,name (,type-spec &rest ,args) |
566 | ,documentation |
567 | (apply |
568 | (find-applicable-type-method ',name ,type-spec) |
569 | ,type-spec ,args))) |
570 | `(defun ,name ,lambda-list |
571 | ,documentation |
572 | (funcall |
573 | (find-applicable-type-method ',name ,type-spec) |
574 | ,@lambda-list))))))) |
575 | |
576 | |
577 | (defmacro define-type-method (name lambda-list &body body) |
578 | (let ((specifier (cadar lambda-list)) |
579 | (args (make-symbol "ARGS"))) |
580 | `(progn |
581 | (add-type-method ',name ',specifier |
582 | #'(lambda (&rest ,args) |
583 | (flet ((call-next-method (&rest args) |
584 | (let ((next-method (find-next-type-method ',name ',specifier))) |
585 | (apply next-method (or args ,args))))) |
586 | (destructuring-bind (,(caar lambda-list) ,@(rest lambda-list)) ,args |
587 | ,@body)))) |
588 | ',name))) |
589 | |
590 | |
591 | ;;; Rules for auto-exporting symbols |
592 | |
593 | (defexport defbinding (name &rest args) |
594 | (declare (ignore args)) |
595 | (if (symbolp name) |
596 | name |
597 | (first name))) |
598 | |
599 | (defexport define-type-generic (name &rest args) |
600 | (declare (ignore args)) |
601 | name) |